Incidence Analysis on Characteristic of High Speed Ball-End Milling Hardened Steel

2011 ◽  
Vol 188 ◽  
pp. 73-77
Author(s):  
Bin Jiang ◽  
Yin Jin Yang ◽  
Xian Li Liu ◽  
Chang Xing Qi ◽  
Xing Fa Zhao
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
End Milling ◽  
Hardened Steel ◽  
Precision Machining ◽  
Row Spacing ◽  
Cutting Efficiency ◽  
High Speed Milling ◽  
Ball End Milling ◽  
Incidence Analysis

In high speed ball-end milling hardened steel, the increase of hardened steel hardness and cutting efficiency make cutting loads changing, and fuzzy and uncertain properties exist in evaluating cutting vibration and machining surface quality. To explore the means for high efficiency and precision machining hardened steel, carried out the experiment of high speed ball-end milling hardened steel, and acquired behavior data of high speed milling characteristic and influencing factors. Founded the model of high speed ball-end milling behavior characteristic using grey system theory, acquired the behavior sequence of high speed ball-end milling hardened steel. Accomplished incidence analysis of high speed milling characteristic, and proposed the solution to high efficiency and precision machining hardened steel. Results indicate that the increase in cutting efficiency makes workpiece vibration and the increase in surface roughness. The influence of the row spacing on the vibration in feed direction is more remarkable than the vibration in row spacing direction. Grey incidence matrix of high speed ball-end milling characteristic reveals the interaction level of characteristic and influencing factors. Increase in rotational speed and row spacing, and decrease in feed per tooth and inclination angle of cutter can restrain availably the vibration in high speed ball-end milling hardened steel, and obtain higher cutting efficiency and surface quality.

Experiment Research of Cutter Edge and Cutting Parameters Influence on Machined Surface Roughness for High Speed Milling Hardened Steel

2010 ◽  
Vol 136 ◽  
pp. 86-90 ◽  
Author(s):  
Wei Zhang ◽  
Min Li Zheng ◽  
Ming Ming Cheng ◽  
Quan Wan
Keyword(s):  
Surface Roughness ◽  
High Speed ◽  
End Milling ◽  
Cutting Parameters ◽  
Hardened Steel ◽  
Machined Surface ◽  
High Speed Milling ◽  
Ball End Milling ◽  
Edge Radius ◽  
Machined Surface Roughness

By using experiment cutter edge topography obtained by super depth three-dimension microscope, fits the cutter edge curve and calculate experiment cutter edge radius value; by high speed milling hardened steel experiment, individually researches cutter edge and cutting parameters influence on machined surface in high speed milling hardened steel with end-milling cutter and ball-end milling cutter. The experiment analysis results show that under the same cutting parameters condition, machined surface roughness in high speed end-milling cutter milling is better than in high speed ball-end milling; within experiment selected cutting parameter range, cutter edge radius is the main influence factor on machined surface roughness in high speed end- milling hardened steel, while the influence on machined surface roughness in high speed ball-end milling hardened steel is not obvious. In end-milling, when edge radius and milling depth are in the same order magnitude or the difference is not obvious, milling depth should be a little bigger than selected cutter edge radius value.

Experiment Research of Cutter Edge and Cutting Parameters Influence on Machined Surface Roughness for High Speed Milling Hardened Steel

2013 ◽  
Vol 670 ◽  
pp. 70-75 ◽  
Author(s):  
Wei Zhang ◽  
M.L. Zheng ◽  
M.M. Cheng ◽  
W.T. Wang
Keyword(s):  
Surface Roughness ◽  
High Speed ◽  
End Milling ◽  
Cutting Parameters ◽  
Hardened Steel ◽  
Machined Surface ◽  
High Speed Milling ◽  
Ball End Milling ◽  
Edge Radius ◽  
Machined Surface Roughness

By using experiment cutter edge topography obtained by super depth three-dimension microscope, fits the cutter edge curve and calculate experiment cutter edge radius value; by high speed milling hardened steel experiment, individually researches cutter edge and cutting parameters influence on machined surface in high speed milling hardened steel with end-milling cutter and ball-end milling cutter. The experiment analysis results show that under the same cutting parameters condition, machined surface roughness in high speed end-milling cutter milling is better than in high speed ball-end milling; within experiment selected cutting parameter range, cutter edge radius is the main influence factor on machined surface roughness in high speed end- milling hardened steel, while the influence on machined surface roughness in high speed ball-end milling hardened steel is not obvious. In end-milling, when edge radius and milling depth are in the same order magnitude or the difference is not obvious, milling depth should be a little bigger than selected cutter edge radius value.

Research on Character of Physical Field Distribution in High Speed Ball-End Milling Hardened Steel

2013 ◽  
Vol 670 ◽  
pp. 114-118
Author(s):  
Bin Jiang ◽  
X.L. Liu ◽  
M.L. Zheng ◽  
Y.J. Yang ◽  
L. Jiang
Keyword(s):  
Field Distribution ◽  
High Speed ◽  
End Milling ◽  
Hardened Steel ◽  
Physical Field ◽  
Modal Shape ◽  
High Speed Milling ◽  
Coupling Field ◽  
Ball End Milling ◽  
Force Coupling

In order to mend cutting instability of ball-end milling cutter caused by the changes of cutting loads in high speed milling hardened steel, we perform the modal analysis and heat-force coupling field analysis of cutter, carry out the experiment of high speed milling hardened steel, investigate the character and effect factor of physical field distribution in high speed ball-end milling hardened steel, and propose the method about the match of diameter and overhang for depressing cutter vibration. Results indicate that the decrease in the ratio of overhang to diameter can transform the first modal shape of cutter from bending modal shape into torsion modal shape. The diameter of cutter is from 30mm to 20mm, the overhang of cutter is from 125mm to 90mm, heat-force coupling field distribution changes slightly, resonance of cutter does not occur, and efficiency in machining hardened steel can be improved effectively by higher cutting speed.

Cluster Analysis on Vibration Characteristic in High Speed Ball-End Milling Hardened Steel

2011 ◽  
Vol 188 ◽  
pp. 145-149
Author(s):  
Bin Jiang ◽  
S.C. Yang ◽  
Yin Jin Yang ◽  
Min Li Zheng ◽  
P. Sun
Keyword(s):  
Surface Roughness ◽  
High Frequency ◽  
High Speed ◽  
End Milling ◽  
Low Frequency ◽  
Hardened Steel ◽  
High Speed Milling ◽  
Ball End Milling ◽  
Vibration Behavior ◽  
Low Frequency Vibration

Aim at the uncertainty of vibration behavior in high speed ball-end milling hardened steel, carried out the experiment of high speed milling hardened steel and modal analysis of cutter, studied vibration behavior of cutter and workpiece, and established vibration behavior sequence of high speed milling hardened steel. Using gray system theory, did gray cluster analysis of vibration characteristics, explored the correlation among cutter vibration, workpiece vibration and surface roughness characteristics, put forward the method of characterizing vibration characteristics in high speed ball-end milling hardened steel. The results show that high frequency vibrations of cutter and workpiece are caused by the interaction of centrifugal and dynamic cutting force, the increase of cutter overhang enhances high frequency vibration of cutter, the characteristic of cutter vibration changes from low frequency vibration to interaction of low frequency vibration and high frequency vibration. Using cutters with different overhang, surface roughness of high speed milling hardened steel has similar characteristics, surface roughness in row spacing direction can characterize low frequency vibration of cutter, and surface roughness in feed can characterize resonance characteristic of cutter caused by high frequency vibrations of cutter and workpiece.

Dynamics Characteristics of High Speed Ball-End Milling Cutter for Machining Hardened Steel

2010 ◽  
Vol 455 ◽  
pp. 127-131
Author(s):  
Bin Jiang ◽  
Min Li Zheng ◽  
Jun Zhou ◽  
D.H. Xia
Keyword(s):  
Cutting Force ◽  
High Speed ◽  
End Milling ◽  
Hardened Steel ◽  
Milling Cutter ◽  
High Speed Milling ◽  
Ball End Milling ◽  
Modal Characteristics ◽  
Dynamic Cutting Force ◽  
Cutting Vibration

In order to depress cutter vibration caused by high hardness and periodic change of cutting force in high speed milling complex surface, investigated the modal characteristics of ball-end milling cutter through the modal analysis and transient analysis. Using the models of dynamic cutting force and cutting vibration, acquired dynamics characteristics of high speed ball-end milling cutter by the spectrum analysis of dynamic cutting force, simulation analysis of cutting vibration and experiment of high speed milling hardened steel. Results indicate that high speed ball-end milling energy concentrates in few special frequencies, the rotational speed and the numbers of cutter teeth determine the fundamental frequency. High speed ball-end milling cutter easily makes radial bending vibration by the lower modal characteristics, the overhang and inclination angle of cutter affect its dynamics characteristics significantly, and the modal parameters and vibration model of cutter acquired by step response method have higher credibility.

Influence Characteristics of Cutting-Contact Stress on the Wear of Milling Cutter in High Speed Ball-End Milling Hardened Steel

2012 ◽  
Vol 500 ◽  
pp. 192-197
Author(s):  
Bin Jiang ◽  
Pei Yi Zhao ◽  
Yong Zhong Wang ◽  
Yi Hang Fan
Keyword(s):  
Wear Rate ◽  
Contact Stress ◽  
High Speed ◽  
End Milling ◽  
Cutting Parameters ◽  
Hardened Steel ◽  
Curvature Radius ◽  
Milling Cutter ◽  
Ball End Milling ◽  
Pressure Stress

Adopted the cutting-contact model of high speed ball-end milling hardened steel surfaces, researched distribution characteristics of cutting-contact stress; by researching the influence of the distribution of this stress on cutter wear, clarified the influence theory of milling pattern and cutting parameters on initial wear of milling cutter. By using the method of climbing, conventional milling alternating and changing cutting parameters, verified the influence of milling pattern and cutting parameters on initial wear pattern. The result showed that, initial wear mechanism of high speed milling hardened steel is an interaction of multiple wear mechanisms under the effect of friction and alternating pressure stress, by using conventional milling can significantly reduce concave curvature radius of hardened steel, the contact stress of blade area and front, rear flank, inhibit crushing and wear rate of the milling cutter surfaces. Under this condition, by increasing rotation speed and reducing the feed per blade, will further increase the strength of this effect, and achieve the purpose of reducing the initial wear, inhibiting the wear rate and extending the cutters life.

Physical Field Evaluation Model of High Speed Ball-End Milling Hardened Steel

2012 ◽  
Vol 426 ◽  
pp. 122-125 ◽  
Author(s):  
Bin Jiang ◽  
D.H. Xia ◽  
Min Li Zheng ◽  
Y. Li ◽  
X.C. Liu
Keyword(s):  
High Speed ◽  
End Milling ◽  
Evaluation Model ◽  
Safety Margin ◽  
Field Evaluation ◽  
Hardened Steel ◽  
Physical Field ◽  
Field Analysis ◽  
Ball End Milling ◽  
The Impact

Based on the experiment of high speed ball-end milling hardened steel, investigated the distribution characteristics of cutting force and cutting heat and wearing character of cutter, and set up analysis model of cutter physical field. Using failure criterion and safety margin of cutter, founded physical field evaluation model of high speed ball-end milling cutter. By means of physical field analysis and experiment, explored the influence of cutting parameters on cutting property during cutter wear. Results indicate that the method of safety margin and physical field evaluation model can evaluate cutting property of cutter effectively, the impact of feed per tooth on physical field and safety margin is noticeable, and high speed and small feed are helpful to improve safety margin and cutting performance of cutter.

Cutting Thickness of High Speed Ball-End Milling Hardened Steel

2012 ◽  
Vol 426 ◽  
pp. 24-27
Author(s):  
Shu Cai Yang ◽  
Bin Jiang ◽  
H.Y. Li ◽  
M.L. Zheng ◽  
S.J. Wang
Keyword(s):  
High Speed ◽  
End Milling ◽  
Chip Thickness ◽  
Surface Damage ◽  
Transformation Process ◽  
Hardened Steel ◽  
Machined Surface ◽  
Element Analysis ◽  
Ball End Milling ◽  
Adiabatic Shearing

In order to solve the problem of machined surface damage and machining efficiency decline that caused by the decrease of effective cutting thickness in high speed ball-end milling hardened steel, using high speed cutting adiabatic shearing model, analyzed the adiabatic shearing deformation on hardened steel, and proposed the criterion of chip separating position. Analyzed the force in the transformation process from cutting to plowing, the influence of cutter deformation on cutting thickness was studied, and established the minimum cutting thickness model. Having done finite element analysis of cutter and experiment of high speed milling hardened steel, the validity of the minimum cutting thickness model was proved. The results show that cutting thickness changes from small to large, and then from large to small under the influence of cutting trajectory and tool edge radius. The deformation of cutter leads to the increase of the minimum cutting thickness, and further enhances chip thickness thinning effect. High feed can compensate cutting thickness thinning and the minimum cutting thickness model provides an effective way to restrain the damage of machined surface and cutter caused by cutter plowing.

scholarly journals Efficiency of technology use for high-speed end milling of hardened parts of GTE fuel equipment

2021 ◽  
Vol 2021 (7) ◽  
pp. 41-48
Author(s):  
Vladimir Makarov ◽  
Igor' Sedinin
Keyword(s):  
Technology Use ◽  
High Speed ◽  
End Milling ◽  
Hardened Steel ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
High Speed Milling ◽  
Optimum Cutting ◽  
Experimental Researches ◽  
Cutting Modes

There are shown results of high-speed end milling experimental researches of critical hardened steel parts in fuel control equipment of modern aircraft gas turbine engines (GTE) with the purpose of optimum cutting mode definition ensuring the roughness Ra ≤ 0.63 mkm for the surface worked and deviation from the plane not more than 0.015 mm. The empirical mathematical models of high-speed milling are obtained and optimum cutting modes are defined.

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